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8a10919d08
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Masami Hiramatsu 8a10919d08 perf probe: Fix to show inlined function callsite without entry_pc 
[ Upstream commit 18e21eb671 ]

Fix 'perf probe --line' option to show inlined function callsite lines
even if the function DIE has only ranges.

Without this:

  # perf probe -L amd_put_event_constraints
  ...
      2  {
      3         if (amd_has_nb(cpuc) && amd_is_nb_event(&event->hw))
                        __amd_put_nb_event_constraints(cpuc, event);
      5  }

With this patch:

  # perf probe -L amd_put_event_constraints
  ...
      2  {
      3         if (amd_has_nb(cpuc) && amd_is_nb_event(&event->hw))
      4                 __amd_put_nb_event_constraints(cpuc, event);
      5  }

Committer testing:

Before:

  [root@quaco ~]# perf probe -L amd_put_event_constraints
  <amd_put_event_constraints@/usr/src/debug/kernel-5.2.fc30/linux-5.2.18-200.fc30.x86_64/arch/x86/events/amd/core.c:0>
        0  static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
                                                struct perf_event *event)
        2  {
        3         if (amd_has_nb(cpuc) && amd_is_nb_event(&event->hw))
                          __amd_put_nb_event_constraints(cpuc, event);
        5  }

           PMU_FORMAT_ATTR(event, "config:0-7,32-35");
           PMU_FORMAT_ATTR(umask, "config:8-15"   );

  [root@quaco ~]#

After:

  [root@quaco ~]# perf probe -L amd_put_event_constraints
  <amd_put_event_constraints@/usr/src/debug/kernel-5.2.fc30/linux-5.2.18-200.fc30.x86_64/arch/x86/events/amd/core.c:0>
        0  static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
                                                struct perf_event *event)
        2  {
        3         if (amd_has_nb(cpuc) && amd_is_nb_event(&event->hw))
        4                 __amd_put_nb_event_constraints(cpuc, event);
        5  }

           PMU_FORMAT_ATTR(event, "config:0-7,32-35");
           PMU_FORMAT_ATTR(umask, "config:8-15"   );

  [root@quaco ~]# perf probe amd_put_event_constraints:4
  Added new event:
    probe:amd_put_event_constraints (on amd_put_event_constraints:4)

  You can now use it in all perf tools, such as:

  	perf record -e probe:amd_put_event_constraints -aR sleep 1

  [root@quaco ~]#

  [root@quaco ~]# perf probe -l
    probe:amd_put_event_constraints (on amd_put_event_constraints:4@arch/x86/events/amd/core.c)
    probe:clear_tasks_mm_cpumask (on clear_tasks_mm_cpumask@kernel/cpu.c)
  [root@quaco ~]#

Using it:

  [root@quaco ~]# perf trace -e probe:*
  ^C[root@quaco ~]#

Ok, Intel system here... :-)

Fixes: 4cc9cec636 ("perf probe: Introduce lines walker interface")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/157199322107.8075.12659099000567865708.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-31 16:35:46 +01:00
arch pinctrl: sh-pfc: sh7734: Fix duplicate TCLK1_B 2019-12-31 16:35:32 +01:00
block blk-mq: make sure that line break can be printed 2019-12-17 20:35:48 +01:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto crypto: user - fix memory leak in crypto_report 2019-12-13 08:52:48 +01:00
Documentation mm, thp, proc: report THP eligibility for each vma 2019-12-17 20:35:45 +01:00
drivers rtlwifi: fix memory leak in rtl92c_set_fw_rsvdpagepkt() 2019-12-31 16:35:41 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs Btrfs: fix removal logic of the tree mod log that leads to use-after-free issues 2019-12-31 16:34:44 +01:00
include rfkill: allocate static minor 2019-12-31 16:35:38 +01:00
init fork: fix some -Wmissing-prototypes warnings 2019-12-05 09:21:04 +01:00
ipc ipc/mqueue.c: only perform resource calculation if user valid 2019-08-06 19:06:52 +02:00
kernel bpf/stackmap: Fix deadlock with rq_lock in bpf_get_stack() 2019-12-31 16:35:20 +01:00
lib idr: Fix idr_get_next_ul race with idr_remove 2019-12-17 20:36:02 +01:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm, thp, proc: report THP eligibility for each vma 2019-12-17 20:35:45 +01:00
net rfkill: allocate static minor 2019-12-31 16:35:38 +01:00
samples samples: pktgen: fix proc_cmd command result check logic 2019-12-31 16:34:59 +01:00
scripts modpost: skip ELF local symbols during section mismatch check 2019-12-13 08:52:20 +01:00
security apparmor: delete the dentry in aafs_remove() to avoid a leak 2019-12-05 09:21:19 +01:00
sound ALSA: timer: Limit max amount of slave instances 2019-12-31 16:35:40 +01:00
tools perf probe: Fix to show inlined function callsite without entry_pc 2019-12-31 16:35:46 +01:00
usr kbuild: clean compressed initramfs image 2019-10-07 18:57:16 +02:00
virt KVM: arm/arm64: vgic: Don't rely on the wrong pending table 2019-12-13 08:52:45 +01:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS USB: rio500: Remove Rio 500 kernel driver 2019-10-17 13:44:47 -07:00
Makefile Linux 4.19.91 2019-12-21 10:57:45 +01:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.